French-built LNG-powered Dredger to Maintain Bordeaux Waters

| France, Bordeaux

L'Ostrea France - injection dredger designThe construction of a liquefied natural gas-powered water injection dredger is the intention of a contract formalized late December last year between Atlantic Port of Bordeaux, the GIE Dragages Ports and French shipyard SOCARENAM. This innovative and eco-performing dredge will replace the 1984-registered suction dredger La Maqueline in summer 2019.

Atlantic Port of Bordeaux is set on Europe’s largest estuary, the Gironde, in southwest France where the Dordogne and Garonne rivers meet just downstream of the centre of Bordeaux. The new dredger will work to maintain the navigation channel, reducing the volumes of sediments transported and submerged in the estuary.

SOCARENAM, based in Boulogne sur Mer, was selected by the GIE Dragages Ports following a European call for tender launched in 2017. Bordeaux Port Atlantique says the contract will give rise to the first new construction of a dual-fuel ship in France (excluding LNG carriers).

The dual-fuel engine will allow the dredge to navigate using liquefied natural gas and lighter marine diesel as fuel. Compared to diesel, the use of natural gas as a fuel makes it possible to reduce carbon dioxide (CO2) emissions by 25%, nitrogen oxides (NOx) by 80%, and to almost eliminate emissions of sulfur oxides and fine particles.

The use of this fuel, combined with an electric diesel propulsion system, which is generally more energy efficient, and a method of water injection dredging more adapted to the port sites located in the perimeter of the Bordeaux metropolis, will enable Bordeaux Port Atlantique to carry out the essential maintenance of its port access and equipment in an even more respectful way for the environment.

This new 40 metre dredge, which will be called L’Ostrea (tr. Oyster), has a minimum speed of 12 knots.

Bordeaux Port Authority

Bordeaux Port Atlantique is an industrial and logistics platform based on 7 sites, spread over 100 km of the Gironde estuary. Ideally positioned on the Atlantic seaboard, the Port of Bordeaux handles between 8 and 9 million tons of goods per year (the equivalent of 400,000 trucks) through its 7 specialized terminals which reflect the diversity of the economy of the Atlantic.


Source: Bordeaux Port Atlantique

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